I tried retool, tooljet and appsmith.
It's open source and a little different than the other options you've mentioned. Below is the repo:
https://github.com/Budibase/budibase
Website: https://budibase.com
Here is the website: www.dronahq.com
would love your feedback incase if you are trying.
We take a different angle and believe that low code should still work like code. We focus on a developer first approach.